/* ====================================================================
 * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
 * Copyright (c) 2020 - 2021 mogoweb@gmail.com.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ==================================================================== */

#ifndef OPENSSL_HEADER_SM_LCL_H
#define OPENSSL_HEADER_SM_LCL_H

#include "../internal.h"

#ifndef ROL32
# define ROL32(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
#endif

#define ROUNDS(x0, x1, x2, x3, x4)		\
  ROUND(x0, x1, x2, x3, x4, 0);		\
  ROUND(x1, x2, x3, x4, x0, 1);		\
  ROUND(x2, x3, x4, x0, x1, 2);		\
  ROUND(x3, x4, x0, x1, x2, 3);		\
  ROUND(x4, x0, x1, x2, x3, 4);		\
  ROUND(x0, x1, x2, x3, x4, 5);		\
  ROUND(x1, x2, x3, x4, x0, 6);		\
  ROUND(x2, x3, x4, x0, x1, 7);		\
  ROUND(x3, x4, x0, x1, x2, 8);		\
  ROUND(x4, x0, x1, x2, x3, 9);		\
  ROUND(x0, x1, x2, x3, x4, 10);		\
  ROUND(x1, x2, x3, x4, x0, 11);		\
  ROUND(x2, x3, x4, x0, x1, 12);		\
  ROUND(x3, x4, x0, x1, x2, 13);		\
  ROUND(x4, x0, x1, x2, x3, 14);		\
  ROUND(x0, x1, x2, x3, x4, 15);		\
  ROUND(x1, x2, x3, x4, x0, 16);		\
  ROUND(x2, x3, x4, x0, x1, 17);		\
  ROUND(x3, x4, x0, x1, x2, 18);		\
  ROUND(x4, x0, x1, x2, x3, 19);		\
  ROUND(x0, x1, x2, x3, x4, 20);		\
  ROUND(x1, x2, x3, x4, x0, 21);		\
  ROUND(x2, x3, x4, x0, x1, 22);		\
  ROUND(x3, x4, x0, x1, x2, 23);		\
  ROUND(x4, x0, x1, x2, x3, 24);		\
  ROUND(x0, x1, x2, x3, x4, 25);		\
  ROUND(x1, x2, x3, x4, x0, 26);		\
  ROUND(x2, x3, x4, x0, x1, 27);		\
  ROUND(x3, x4, x0, x1, x2, 28);		\
  ROUND(x4, x0, x1, x2, x3, 29);		\
  ROUND(x0, x1, x2, x3, x4, 30);		\
  ROUND(x1, x2, x3, x4, x0, 31)

extern const uint8_t SMS4_S[256];
extern const uint32_t SMS4_T[256];
extern const uint32_t SMS4_D[65536];

#define S32(A)                          \
  ((SMS4_S[((A) >> 24)       ] << 24) ^	\
   (SMS4_S[((A) >> 16) & 0xff] << 16) ^	\
   (SMS4_S[((A) >>  8) & 0xff] <<  8) ^	\
   (SMS4_S[((A))       & 0xff]))

#if defined(__cplusplus)
extern "C" {
#endif

static inline uint32_t GETU32(const void *in) {
  uint32_t v;
  OPENSSL_memcpy(&v, in, sizeof(v));
  return CRYPTO_bswap4(v);
}

static inline void PUTU32(void *out, uint32_t v) {
  v = CRYPTO_bswap4(v);
  OPENSSL_memcpy(out, &v, sizeof(v));
}

#if defined(__cplusplus)
}  // extern C
#endif

#endif  // OPENSSL_HEADER_SM_LCL_H
